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Asymmetric construction of tetrahedral chiral zinc with high configurational stability and catalytic activity. Nat Commun 2020; 11:6263. [PMID: 33298960 PMCID: PMC7726038 DOI: 10.1038/s41467-020-20074-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 11/12/2020] [Indexed: 12/13/2022] Open
Abstract
Chiral metal complexes show promise as asymmetric catalysts and optical materials. Chiral-at-metal complexes composed of achiral ligands have expanded the versatility and applicability of chiral metal complexes, especially for octahedral and half-sandwich complexes. However, Werner-type tetrahedral complexes with a stereogenic metal centre are rarely used as chiral-at-metal complexes because they are too labile to ensure the absolute configuration of the metal centre. Here we report the asymmetric construction of a tetrahedral chiral-at-zinc complex with high configurational stability, using an unsymmetric tridentate ligand. Coordination/substitution of a chiral auxiliary ligand on zinc followed by crystallisation yields an enantiopure chiral-only-at-zinc complex (> 99% ee). The enantiomer excess remains very high at 99% ee even after heating at 70 °C in benzene for one week. With this configurationally stable zinc complex of the tridentate ligand, the remaining one labile site on the zinc can be used for a highly selective asymmetric oxa-Diels-Alder reaction (98% yield, 87% ee) without substantial racemisation.
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Mary Imelda Jayaseeli A, Ramdass A, Rajagopal S. Selective H2O2 oxidation of organic sulfides to sulfoxides catalyzed by cobalt(III)–salen ion. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.07.020] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lin Y, Wan S, Zou F, Wang Y, Zhang H. Structure–chiroptical property relationship of kinetically labile camphor-derivative β-diketone Yb(iii) complexes: do the adducts coexist as diastereomers or not? NEW J CHEM 2011. [DOI: 10.1039/c1nj20430k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Soininen AJ, Kasëmi E, Schlüter AD, Ikkala O, Ruokolainen J, Mezzenga R. Self-Assembly and Induced Circular Dichroism in Dendritic Supramolecules with Cholesteric Pendant Groups. J Am Chem Soc 2010; 132:10882-90. [DOI: 10.1021/ja103754d] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Antti J. Soininen
- Department of Applied Physics, Aalto University School of Science and Technology, 02150 Espoo, Finland, Department of Materials, Laboratory of Polymer Chemistry, ETH Zurich, 8093 Zürich, Switzerland, and Institute of Food Science & Nutrition, ETH Zurich, 8092 Zürich, Switzerland
| | - Edis Kasëmi
- Department of Applied Physics, Aalto University School of Science and Technology, 02150 Espoo, Finland, Department of Materials, Laboratory of Polymer Chemistry, ETH Zurich, 8093 Zürich, Switzerland, and Institute of Food Science & Nutrition, ETH Zurich, 8092 Zürich, Switzerland
| | - A. Dieter Schlüter
- Department of Applied Physics, Aalto University School of Science and Technology, 02150 Espoo, Finland, Department of Materials, Laboratory of Polymer Chemistry, ETH Zurich, 8093 Zürich, Switzerland, and Institute of Food Science & Nutrition, ETH Zurich, 8092 Zürich, Switzerland
| | - Olli Ikkala
- Department of Applied Physics, Aalto University School of Science and Technology, 02150 Espoo, Finland, Department of Materials, Laboratory of Polymer Chemistry, ETH Zurich, 8093 Zürich, Switzerland, and Institute of Food Science & Nutrition, ETH Zurich, 8092 Zürich, Switzerland
| | - Janne Ruokolainen
- Department of Applied Physics, Aalto University School of Science and Technology, 02150 Espoo, Finland, Department of Materials, Laboratory of Polymer Chemistry, ETH Zurich, 8093 Zürich, Switzerland, and Institute of Food Science & Nutrition, ETH Zurich, 8092 Zürich, Switzerland
| | - Raffaele Mezzenga
- Department of Applied Physics, Aalto University School of Science and Technology, 02150 Espoo, Finland, Department of Materials, Laboratory of Polymer Chemistry, ETH Zurich, 8093 Zürich, Switzerland, and Institute of Food Science & Nutrition, ETH Zurich, 8092 Zürich, Switzerland
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Zeng L, Liu W, Zhuang X, Wu J, Wang P, Zhang W. Highly selective recognition of carbenicillin via concerted interactions in 100% aqueous solution. Chem Commun (Camb) 2010; 46:2435-7. [DOI: 10.1039/b923318k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Rasberry RD, Wu X, Bullock BN, Smith MD, Shimizu KD. A Small Molecule Diacid with Long-Term Chiral Memory. Org Lett 2009; 11:2599-602. [DOI: 10.1021/ol900955q] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Roger D. Rasberry
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
| | - Xiangyang Wu
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
| | - Brooke N. Bullock
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
| | - Mark D. Smith
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
| | - Ken D. Shimizu
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
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Design of supramolecular metal complex catalytic systems for petrochemical and organic synthesis. Russ Chem Bull 2009. [DOI: 10.1007/s11172-008-0117-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Woo Y, Koh D, Lim Y. Complete assignments of NMR data of salens and their cobalt (III) complexes. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2009; 47:184-189. [PMID: 19040194 DOI: 10.1002/mrc.2372] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Salens, derived from 1,2-ethylenediamine and salicylaldehydes, have been widely used as ligands for metal complexes which have been showing enormous potential in chemical properties of asymmetric catalysts as well as biological properties such as anticancer agents. Almost all of the salen-metal complexes with their corresponding metal (II)-complexes show the evidences of chelation of two oxygens in salens. However, several metal (II) complexes, especially cobalt (II) complexes, could not show NMR spectra due to their paramagnetism. Recently, it has been reported that one of the cobalt (III) complexes was used for NMR spectroscopy to evaluate its stereoselectivity as a catalyst. Even though many salen ligands are known, their NMR data are not assigned completely. It was possible that modification in northern part of salen with 2-hydroxyphenyl group afforded another oxygen chelation site in salen ligand. Here we report that synthesis and full NMR assignment of new salen ligands, which form meso 1,2-bis(2-hydroxyphenyl)ethylenediamine) and their cobalt (III) complexes. The assignments of (1)H and (13)C NMR data obtained in this experiment can help us to predict the NMR data of other salen ligands.
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Affiliation(s)
- Yoonkyung Woo
- Division of Bioscience and Biotechnology, RCD, BMIC, RCTC, Konkuk University, Seoul, Korea 143-701
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Kim H, So S, Yen CH, Vinhato E, Lough A, Hong JI, Kim HJ, Chin J. Highly Stereospecific Generation of Helical Chirality by Imprinting with Amino Acids: A Universal Sensor for Amino Acid Enantiopurity. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200803116] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Kim H, So S, Yen CH, Vinhato E, Lough A, Hong JI, Kim HJ, Chin J. Highly Stereospecific Generation of Helical Chirality by Imprinting with Amino Acids: A Universal Sensor for Amino Acid Enantiopurity. Angew Chem Int Ed Engl 2008; 47:8657-60. [DOI: 10.1002/anie.200803116] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Sato H, Furuno Y, Fukuda Y, Okamoto K, Yamagishi A. Crystallization induced chiral locking of a central labile core in a star-shaped tetra-nuclear complex. Dalton Trans 2008:1283-5. [DOI: 10.1039/b717429b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ishii Y, Yoshizawa T, Kubo Y. Dibenzodiaza-30-crown-10-appended bis(zinc porphyrin) tweezers: synthesis and crown-assisted chiroptical behaviour. Org Biomol Chem 2007; 5:1210-7. [PMID: 17406719 DOI: 10.1039/b701317e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In our program for developing chirality manipulation systems, we synthesized bis(zinc porphyrin) 1, with a dibenzodiaza-30-crown-10 as a linker unit. Two structural features were examined. The aza-crown segment exhibited an intermolecular interaction with the zinc(ii) of the porphyrin, capable of causing aggregation to form spherical nanostructures, as inferred by concentration-dependency of (1)H NMR as well as scanning electron microscopy (SEM) observation. We also consider the crown-based conformation flexibility, in which accommodated K(+) tunes the porphyrin orientation into the tweezers conformation, assisting chirality induction upon complexation with chiral diamine 2. The circular dichroism (CD) intensity change essentially reached a plateau at a [(1R,2R)-2] : [1] ratio of 2 : 1 for which a 45% enhancement in the amplitude of CD spectra was observed compared to the K(+)-free conditions. Use of the crown linker of is not limited to promoting chirality induction with diamines in the presence of K(+); chiroptical probing of unprotected amino acids (Lys, His, Trp, and Phe) using 1 was attained through liquid (1 in CH(2)Cl(2))-liquid (the amino acids in 1 N KOH) two-phase extraction. The amphiphilic properties of the crown segment, as well as the K(+)-assisted tweezers conformation, make it possible to explore a potent way to develop chirality sensors for amino acids in water.
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Affiliation(s)
- Yusuke Ishii
- Department of Applied Chemistry, Graduate School of Science and Technology, Saitama University, 255 Shimo-ohkubo, Sakura-ku, Saitama 338-8570, Japan
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Ishii Y, Soeda Y, Kubo Y. Chirality induction in a cation-driven assembly using a crowned metalloporphyrin. Chem Commun (Camb) 2007:2953-5. [PMID: 17622442 DOI: 10.1039/b703670a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
15-Crown-5-appended metalloporphyrin causes a K(+)-driven self-organization to bind a bifunctional guest ditopically, thereby allowing the circular dichroism (CD) detection of chirality induced in the ensemble when chiral amines are employed as the guest; the chiroptical properties are discussed.
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Affiliation(s)
- Yusuke Ishii
- Department of Applied Chemistry, Graduate School of Science and Technology, Saitama University, 255 Shimo-ohkubo, Saitama, 338-8570, Japan
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